Anteans

The Anteans were an early Slavic tribal polity which existed in the 6th century lower Danube in what is now Middle and Southern Russia, Moldova, and central Ukraine. The Anteans invaded Thrace between 533 and 545, after which they became Byzantine foederati and were given gold payments and the fort Turris. Between 545 and the 580s, the Anteans fought in Byzantine campaigns, and they were eventually destroyed by Pannonian Avars at the beginning of the 7th century.